Derek Stanley Arthur Warwick is a British former racing driver, who competed in Formula One between 1981 and 1993. In endurance racing, Warwick won the World Sportscar Championship and 24 Hours of Le Mans, both in 1992 with Peugeot. From Wikipedia
Replaced by Enrique Bernoldi in Montreal after unauthorised remarks, Warwick will resume stewarding at the Austrian Grand Prix.